Answer in brief
CVE-2026-105221 records a Critical severity (CVSS 9.1) vulnerability in Gist RubyGem before 6.1.0 Disabled TLS Certificate Verification. The current sources do not mark it as known exploited. The current feed maps defunkt/gist (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps defunkt/gist (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| defunkt/gistgeneric | >=4.0.0 <6.1.0 | 6.1.0 |
Published upstream
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 4, 2026
The gist RubyGem before 6.1.0 contains an improper certificate validation vulnerability that allows on-path attackers to intercept HTTPS traffic because http_connection in lib/gist.rb sets VERIFY_NONE. Attackers can present any certificate to read or modify GitHub API traffic, stealing OAuth tokens and login credentials to read and modify the victim's gists.
Quoted source text, attributed separately from HOL analysis.